This has been occurring for the past several months or so, I'm not sure if I'm the only one experiencing it so I thought I'd post about it here.

Basically, when I click the drop down menu to view the subreddits I'm subscribed to, not all of them show up. It'll show r/leagueoflegends one moment, then the next time I click the drop down menu, that will disappear, but the rest of my subreddits will still be there.

I have a similar issue. I've un-subbed from multiple subreddits but they often reappear in my subreddit drop down. When they do, they force out other, more recent subs. This has been happening for quite a while. Go through your list and see if there are subs that you've unsubscribed from showing up. Might be the exact same issue. Every time I try to search for a solution, the only things I find are related to Reddit mobile apps like Alien Blue.